and on sale now for a great price! Anyway, I use it all the time and about a month ago, I had the heat turned up too high and I burned the pan, it left a huge ugly black mark, and I was sick. Hubby tried to scrub it and so did I. We tried BKF to no avail. Further reading and I saw that it must soak for a time and it takes lots of really hard scrubbing. So, today I tackled the job and my beautiful pan came out looking like new. I am elated! Thanks to all of you who made comments about BKF.....all it took was for me to get into it , and really scrub. I used a nylon scrubby made by a lady here in town and sold at my hair dressers shop, of all places!https://www.williams-sonoma.com/products/all-clad-d5-stainless-steel-all-in-one-pan/?catalogId=66&sku=803861&cm_ven=PLA&cm_cat=Google&cm_pla=Cookware%20%3E%20Saute%20Pans&cm_ite=803861&gclid=CjwKCAiAzuPuBRAIEiwAkkmOSCUQ98rt_Pb1OsDGhPfaMOyqNAErvZZTJlwlPYEj